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Description

The Woocommerce Custom Product Addons Pro plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 5.4.1 via the custom pricing formula eval() in the process_custom_formula() function within includes/process/price.php. This is due to insufficient sanitization and validation of user-submitted field values before passing them to PHP's eval() function. The sanitize_values() method strips HTML tags but does not escape single quotes or prevent PHP code injection. This makes it possible for unauthenticated attackers to execute arbitrary code on the server by submitting a crafted value to a WCPA text field configured with custom pricing formula (pricingType: "custom" with {this.value}).

PUBLISHED Reserved 2026-03-11 | Published 2026-03-23 | Updated 2026-04-08 | Assigner Wordfence




CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

Product status

Default status
unaffected

Any version
affected

Timeline

2026-03-17:Vendor Notified
2026-03-23:Disclosed

Credits

Ren Voza finder

References

www.wordfence.com/...-defc-4722-9af9-3cae94e98632?source=cve

acowebs.com/woo-custom-product-addons/

cve.org (CVE-2026-4001)

nvd.nist.gov (CVE-2026-4001)

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